"Pete " <harri.short@hotmail.com> wrote in message news:kfg5d3$6k6$1@newscl01ah.mathworks.com...> Hi,> I am trying to use a For Loop to assign each individual number in a 31x1 > matrix a letter. I have tried to create a For loop but i keep getting an > error saying that it cannot label the point as there are not enough points > in the matrix, i.e there are 31 numbers in the matrix and it is trying to > find the 32nd. What am i doing wrong? Here is what i have at the moment:>> for j=1:length(Tr)> A=Tr(j);> B=Tr(j+1);

When j is equal to length(Tr), Tr(j+1) is one past the end of the array. How to fix this depends on what exactly you're trying to do. There are likely ways to do what you described without a loop, depending on the specific details behind your individual numbers. Are they integer values? Are they unique? What criteria are you using to generate the number -> letter mapping? If you post more information to the newsgroup, people may be able to offer more specific suggestions.